CVE-2018-14461 Explained : Impact and Mitigation

In tcpdump versions prior to 4.9.3, a buffer over-read issue exists in the LDP parser, specifically within the print-ldp.c file, in the ldp_tlv_print() function.

Understanding CVE-2018-14461

This CVE involves a buffer over-read vulnerability in tcpdump versions before 4.9.3.

What is CVE-2018-14461?

The LDP parser in tcpdump before version 4.9.3 is affected by a buffer over-read in print-ldp.c:ldp_tlv_print().

The Impact of CVE-2018-14461

The vulnerability could allow an attacker to exploit the buffer over-read issue, potentially leading to information disclosure or a denial of service (DoS) condition.

Technical Details of CVE-2018-14461

This section provides more in-depth technical insights into the CVE.

Vulnerability Description

The LDP parser in tcpdump before 4.9.3 has a buffer over-read in print-ldp.c:ldp_tlv_print().

Affected Systems and Versions

Product: Not applicable
Vendor: Not applicable
Versions affected: All versions prior to 4.9.3

Exploitation Mechanism

The vulnerability can be exploited by crafting malicious LDP packets to trigger the buffer over-read in the ldp_tlv_print() function.

Mitigation and Prevention

Mitigation strategies and steps to prevent exploitation of the vulnerability.

Immediate Steps to Take

Update tcpdump to version 4.9.3 or later to mitigate the vulnerability.
Monitor vendor security advisories for patches and updates.

Long-Term Security Practices

Regularly update software and apply security patches promptly.
Implement network segmentation and access controls to minimize the attack surface.
Conduct regular security assessments and penetration testing.

Patching and Updates

Apply the latest security updates and patches provided by the tcpdump vendor to address the buffer over-read vulnerability.